Improvement in flask for molding pipe



No. 86,144 PATENTED JAN. 26, 1869. J. FARRAR I; L. P. WRITING.

FLASK FOR MOLDING PIPE.

UNITED STATES PATENT OFFICE.

JOHN FARRAR, OF PROVIDENCE, RHODE ISLAND, AND LEWIS F. WHITING,

OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN FLASK FOR MOLDING PIPE.

Specification forming part of Letters Patent No. 86, [44, dated January 26, 1869.

To all whom it may concern:

Be it known that we, J OHN FARRAR, of-the city and county of Providence, in the State of Rhode Island, and Lnwrs F. WRITING, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Molds for Casting Metal; and we do hereby declare the following to be a full and correct description of the same, sufiicient to enable others skilled in the art to which your invention appertains to fully understand and use the same, reference being had to the accompanying drawings, which make part of this specification, and in which- Figure l is a perspective view of the mold when open. Fig. 2 is a similar view when closed. Fig. 3 is a vertical cross-section of the same, and Fig. 4 is a detached view of one end of it.

Like letters of reference indicate like parts in the several figures. I

The nature of our invention is an improve ment on the patent granted to John Farrar and William Groves of July 30, 1867 and it consists in, first, casting the flanges of a flask separate from the flask, and providing them with slots, so as to allow for the expansion of the same; second, constructing these flanges in sections, and thereby preventing the flask itself from being affected by any ex pansion of the same; third, providing the flask, on its outside, with ribs to strengthen it and prevent it from warping.

A great objection to the flask patented by John Farrar and William Grove, July 30, 1867, is that the flanges, being cast with the flask, tend to bend or w'arp the flask and crack the lining, and the flask is not sufiiciently stiff or firm to withstand the expansion of the flanges.

The object of our invention is to obviate this difliculty, and to produce a flask and mold which will be thoroughly eificient in its operation.

y We construct our flask in three or more longitudinal sections, hinged to each other, as shown. The flanges, which serve to hold the lining b in place, are cast in sections a, which may be screwed, bolted on, or. in any suitable way secured to the sections of 'the flask, and are provided with slots c, which prevent the warping of each individual section a, while their being constructed in sections prevents any warping which might occur from affectin g and injuring the flask. The outside of the flask is provided with longitudinal ribs 11, strengthened and braced in the center by a cross-rib, 6, while short cross-ribs f serve to attach the hinges to. By means of these ribs 01 e the flask is strengthened so as to be able to withstand any danger of warping.

The tunnel portion 9 of the flask, through which the metal is poured, weprefer making of iron instead of lining it, casting it in one piece, which is bolted in. By this means the ends of the castings are made smooth, and the composition lining is preventedfrom breaking.

Having thus described our invention, what we claim as-new therein, and desire to secure by Letters Patent, is-

1. The flanges a, when cast separately from the flask, substantially as and for the purposes set forth.

2. The flanges a, when cast in separate sections, separately from the flask, substantially as and for the purposes set forth.

3. The slots 0 in the flanges a, substantially as and for the purposes described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JOHN FARRAR. LEWIS F. 'HITING.

Witnesses:

J. H. ADAMs, E. L. DYER. 

